creating GroupNodes and LinkNodes

[Marc Sommer <ma...@schlund.de>]

hi NG,

i need help to create GroupNodes and LinkNodes with the low-level-api of
slide...

<objectnode classname="org.apache.slide.structure.GroupNode"
uri="/users/testgroup">
<objectnode classname="org.apache.slide.structure.LinkNode"
uri="/users/testgroup/testuser" linkedUri="/users/testuser"/>
</objectnode>

could anybody post a snippet which shows that, including the usage of
the NamespaceAccessToken and SecurityToken?

thanks in advance
marc


-- 

Marc Sommer
Interne Applikationen
+49 721 91374-364
PGP Key-ID: 0743ED19
Schlund + Partner AG
http://www.schlund.de


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AW: creating GroupNodes and LinkNodes

[Michael Plomer <m_...@gmx.net>]

Hi Marc,

first, you'll need to obtain a NamespaceAccessToken:

	// prepare the namespace access token (assuming you want the
default namespace)
	String namespace = Domain.getDefaultNamespace();
	NamespaceAccessToken nat = Domain.accessNamespace(new
SecurityToken(this), namespace);
	// "this" is a HttpServlet in my case, but could be almost
anything (or so I think...)

Next, you need a SlideToken, which you could construct, for instance,
>from the
credentials in your servlets request (that is, assuming you are writing
a servlet...).

	// prepare the slide token
	Principal principal = request.getUserPrincipal();
	CredentialsToken credentials;
	if (principal == null)
		credentials = new CredentialsToken("");
	else
		credentials = new CredentialsToken(principal);
	SlideToken st = new SlideTokenImpl(credentials);

Creating a group node is pretty straightforward, most of the code deals
with exception handling:

	// prepare the structure helper
	Structure structureHelper = nat.getStructureHelper();

	try {
		try {
			// start namespace tansaction
			nat.begin();
			// create the node in the structure
			ObjectNode object = new GroupNode();
	            structureHelper.create(st, object,
"/users/testgroup");
	            // commit the transaction
	            nat.commit();
		} catch (AccessDeniedException ex) {
			... // handle exception
	            throw ex;
		} catch (ObjectAlreadyExistsException ex) {
			... // handle exception
	            throw ex;
		} catch (Exception ex) {
			... // handle exception
	            throw ex;
		}
		// ... SUCCESS ...
	} catch (Exception ex) {
		try {
			nat.rollback();
		} catch (SystemException sysex) { // catch silently }
	}

Linking users into the group should be done like this:

	// prepare the structure helper
	Structure structureHelper = nat.getStructureHelper();

	try {
		try {
			// start namespace tansaction
			nat.begin();
			// retrieve the node to be linked
			ObjectNode object = structureHelper.retrieve(st,
"/users/testuser");
			// create the link node
			structureHelper.createLink(st, new LinkNode(),
"/users/testgroup/testuser", object);
	            // commit the transaction
	            nat.commit();
		} catch (AccessDeniedException ex) {
			... // handle exception
	            throw ex;
		} catch (ObjectAlreadyExistsException ex) {
			... // handle exception
	            throw ex;
		} catch (Exception ex) {
			... // handle exception
	            throw ex;
		}
		// ... SUCCESS ...
	} catch (Exception ex) {
		try {
			nat.rollback();
		} catch (SystemException sysex) { // catch silently }
	}

Hope this helps. Keep in mind that while this code is from a servlet
I wrote and actually works, I might have edited in some errors when
writing this mail...

Regards,
Michael

-------/ Michael Plomer    /--/ stud. Hilfskraft CONCERT  /----
------/ Fraunhofer IPSI   /--/ Kooperationskomponenten   /-----
-----/ Darmstadt/Germany /--/ eMail: plomer@ipsi.fhg.de /------
----/ 0173 / 5 33 66 23 /--/         m_plomer@gmx.net  /-------

>>-----Ursprüngliche Nachricht-----
>>Von: Marc Sommer [mailto:marc.sommer@schlund.de] 
>>Gesendet: Donnerstag, 22. Mai 2003 16:52
>>An: Slide Users Mailing List
>>Betreff: creating GroupNodes and LinkNodes
>>
>>
>>hi NG,
>>
>>i need help to create GroupNodes and LinkNodes with the 
>>low-level-api of
>>slide...
>>
>><objectnode classname="org.apache.slide.structure.GroupNode"
>>uri="/users/testgroup">
>><objectnode classname="org.apache.slide.structure.LinkNode"
>>uri="/users/testgroup/testuser" linkedUri="/users/testuser"/>
>></objectnode>
>>
>>could anybody post a snippet which shows that, including the usage of
>>the NamespaceAccessToken and SecurityToken?
>>
>>thanks in advance
>>marc
>>
>>
>>-- 
>>
>>Marc Sommer
>>Interne Applikationen
>>+49 721 91374-364
>>PGP Key-ID: 0743ED19
>>Schlund + Partner AG
>>http://www.schlund.de
>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: slide-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: slide-user-help@jakarta.apache.org
>>
>>


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